The first component is correct. It is possible to increase the range of the electrified system overall, whether it's buses or coaches—or rail, for that matter—by adding more charging capacity, so you're pulling in to a stop, topping up and then continuing along your route.
To the second part of your question, it's not so much about chargers becoming more efficient. These are really high-power charging systems, at 450 kilowatts or 600 kilowatts. They pump out a lot of electrons at a very high power level. They're pretty efficient. The problem is the absorption on the bus. It's the powertrain, the battery and the software being able to absorb the power at that level. If you're basically blasting the powertrain with a ton of energy, you're going to blow the battery; you're going to degrade it.
The issue so far has been the absorption rate, and that slows it right down. We can put high-power chargers everywhere.